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If I remember I'll pull out the card and test it again after work. From what I recall, the IIci would happy chime, then just hang (never displaying any video). With the card removed, all was back to normal. I think a card that gives a death chime may be indicative of some bad RAM on the card...

Connector on DOS card 26 pin Male on cable Video out on 6100 15 pin Male on cable Video to monitor 15 pin Female on cable Joystick connector 15 pin Female on cable 1 2 (Button 1) 2 3 (J1 - X) 3 6 (J1 - Y) 4 9 (Blue) 9 (Blue) 5 5 (Green) 5 (Green) 6 3 (CSYNC)...

It's not too hard to fix this issue. Apple decided to use a plastic bar to support the spring force of the hinge, and to no one's surprise it frequently breaks. The person in this guide used a metal plate. When I did mine a few years back, I just found a couple large washers to support the ends...

Hi Steve, I'm fighting almost the same problem: https://tinkerdifferent.com/threads/another-iici-thread-no-video.2730/ I'll let you know if I solve anything on my end. My board does chime, but all other symptoms you mentioned are happening with this one as well.

All surface-mounted capacitors have been replaced (I prefer the aluminum electrolytics). My next course of action will be to test the address/data lines to the VIAs. I have spent most of my time around the ASC to try and get sound working, but all connections have been restored. Time to...

I think you're right as far as the startup circuit is concerned, I should remove UE13, UB13, and UD13 to deep clean under them. Some sort of short keeping the signal line at +5V would cause it to continually try and power up. I've had different luck thankfully. Using a real old SyncMaster 171N...

Small update - the vertical black lines are gone! Now I'm back to the standard simasimac pattern (for this brand VRAM happens to be the horizonal black/white bars). UE8 was missing two connections to the VRAM which was causing the vertical stripes. In my probing, I also found a handful of...

As promised, I'm starting a thread for my tinkering with upgrading the internals of the well-known and somewhat hated power supplies for the Mac II/Quadra 650/700 desktops. Like many of you, I have a few of these that are dead as a doornail. For the rebuild, I've ordered three 300W Seasonic...

Good to know! If I ever get around to working on my cache card I'll update the group. Hard to have motivation to work on them when we're both running more "souped up" cards for the IIci. I got ahold of a 50MHz PowerCache (which your Booster 040 would absolutely blow out of the water)!

All fixed! A replacement SCC did the trick. I actually used the chip I had saved for my sleek black reloaded board, but seeing Snooper run without issue was worth the sacrifice. That new board is socketed, so I'll give the old chip a test at some point. If the old controller chip was bad, it...

I was browsing and have noticed quite a few unresolved threads surrounding video/startup issues with the Mac IIci. My pledge to the forum is that when I solve my own issues, I'll post a follow-up with the solution (if there is one) ;) I've got a recapped IIci board that has a couple of issues...

Did you ever have any luck with the cache card troubleshooting? I have one that behaves in the exact manner you had previously mentioned (boots to a black screen).

Only thing I can see in schematics are the Bournes RP2 and RP3, which I checked out as part of my initial probing. Other resistors include R40-R43, but I'd doubt that's the cause because they're going to the edge connector on the front of the board. Thanks for the idea though, keep them coming!

I'm posting this here in hopes of eventually helping someone else out as I work to solve my own problems. Here's one I haven't seen before, it's a "simasimac" screen with the lovely addition of some video MUX issues (vertical bands). Funny thing is, the board itself is very clean. I've seen much...

Hi all, I am working on an SE/30 that works with the exception of the serial ports. Snooper 2 is my go-to for testing, as it seems to be reliable in picking up problems. The issue is, the entire system crashes when I run the serial port tests. With loopbacks connected, it'll give me the...

Have a good look on the backside of the board at the solder joints for the ROM sockets. If you have no video or chime, my bet is that it's poor contact on the ROMs.

Try replacing the horizonal output transistor! https://www.digikey.com/en/products/detail/onsemi/BU406G/918378

Flux? As in flux capacitor? Oh wait, that's a DeLorean not a Corvette!

Thank you! I actually used two floor jacks, alternating raising the front and rear of the car. The cribbing blocks come apart and I’d add layers as needed. Just enough to lower the transmission and slide it out.

It's getting to be that time of year when my 1982 Corvette sees more street time! Two-tone blue with a dark blue interior. I bought it in college and don't think I'll ever want to sell it. I've built a new transmission and rear end for it (installed using my DIY car "lift"). Would eventually...